The first incident was reported at 8:10 p.m., when officers were called to the 2000 block of Austin Street near Fruitvale Avenue on a report of an unresponsive person on the ground, police spokeswoman Johnna Watson said.

The officers found power lines and parts of a large tree had fallen in the area.

The person was pronounced dead at the scene. The cause of death remains under investigation, police said.

Then at 8:37 p.m., a collision was reported in the 13000 block of Skyline Boulevard in which a vehicle struck a tree.

Officers found a vehicle had left the roadway and struck a tree in the center divider. The male driver was found unresponsive and was declared dead at the scene, Watson said.

The cause of the collision remains under investigation, she said.

The identities of the victims in both cases have not yet been released, according to the Alameda County coroner’s bureau.